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Language
Java using Applet
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Description
Sum of two numbers
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import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class SumOfTwoNumbers extends Applet implements ActionListener {
private static final long serialVersionUID = 1L;
private TextField field_a, field_b;
private Label label_sum;
private Button button;
@Override
public void init() {
field_a = new TextField(4);
field_b = new TextField(4);
label_sum = new Label();
button = new Button("Process");
setLayout(new BorderLayout());
Panel panel, subpanel;
panel = new Panel(new BorderLayout());
subpanel = new Panel(new GridLayout(2, 1));
subpanel.add(new Label("Enter the value of a:"));
subpanel.add(new Label("Enter the value of b:"));
panel.add(subpanel, BorderLayout.WEST);
subpanel = new Panel(new GridLayout(2, 1));
subpanel.add(field_a);
subpanel.add(field_b);
panel.add(subpanel);
add(panel, BorderLayout.NORTH);
panel = new Panel(new FlowLayout());
panel.add(button);
add(panel);
panel = new Panel(new BorderLayout());
subpanel = new Panel(new GridLayout(1, 1));
subpanel.add(new Label("Value of sum:"));
panel.add(subpanel, BorderLayout.WEST);
subpanel = new Panel(new GridLayout(1, 1));
subpanel.add(label_sum);
panel.add(subpanel);
add(panel, BorderLayout.SOUTH);
button.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent actionEvent) {
double a, b, sum;
try {
a = Double.parseDouble(field_a.getText());
b = Double.parseDouble(field_b.getText());
} catch (NumberFormatException numberFormatException) {
return;
}
sum=a+b;
label_sum.setText(String.valueOf(sum));
}
}
import java.awt.*;
import java.awt.event.*;
public class SumOfTwoNumbers extends Applet implements ActionListener {
private static final long serialVersionUID = 1L;
private TextField field_a, field_b;
private Label label_sum;
private Button button;
@Override
public void init() {
field_a = new TextField(4);
field_b = new TextField(4);
label_sum = new Label();
button = new Button("Process");
setLayout(new BorderLayout());
Panel panel, subpanel;
panel = new Panel(new BorderLayout());
subpanel = new Panel(new GridLayout(2, 1));
subpanel.add(new Label("Enter the value of a:"));
subpanel.add(new Label("Enter the value of b:"));
panel.add(subpanel, BorderLayout.WEST);
subpanel = new Panel(new GridLayout(2, 1));
subpanel.add(field_a);
subpanel.add(field_b);
panel.add(subpanel);
add(panel, BorderLayout.NORTH);
panel = new Panel(new FlowLayout());
panel.add(button);
add(panel);
panel = new Panel(new BorderLayout());
subpanel = new Panel(new GridLayout(1, 1));
subpanel.add(new Label("Value of sum:"));
panel.add(subpanel, BorderLayout.WEST);
subpanel = new Panel(new GridLayout(1, 1));
subpanel.add(label_sum);
panel.add(subpanel);
add(panel, BorderLayout.SOUTH);
button.addActionListener(this);
}
@Override
public void actionPerformed(ActionEvent actionEvent) {
double a, b, sum;
try {
a = Double.parseDouble(field_a.getText());
b = Double.parseDouble(field_b.getText());
} catch (NumberFormatException numberFormatException) {
return;
}
sum=a+b;
label_sum.setText(String.valueOf(sum));
}
}